816710749 has 4 divisors (see below), whose sum is σ = 852219936. Its totient is φ = 781201564.

The previous prime is 816710689. The next prime is 816710767. The reversal of 816710749 is 947017618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 947017618 = 2 ⋅473508809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816710749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816710149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17754559 + ... + 17754604.

It is an arithmetic number, because the mean of its divisors is an integer number (213054984).

Almost surely, 2^816710749 is an apocalyptic number.

It is an amenable number.

816710749 is a deficient number, since it is larger than the sum of its proper divisors (35509187).

816710749 is a wasteful number, since it uses less digits than its factorization.

816710749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35509186.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 816710749 is about 28578.1516022293. The cubic root of 816710749 is about 934.7369784542.

The spelling of 816710749 in words is "eight hundred sixteen million, seven hundred ten thousand, seven hundred forty-nine".